:root {
    /* Maumsarang / Mingl Light Theme — Navy + Ocean Blue + Green-Teal accent */
    --bg-color: #f2f4f7;
    --chat-bg: #ffffff;
    --border-color: #e1e7ee;
    --text-color: #003057;
    --text-muted: #5a6b7c;
    --input-bg: #ffffff;
    --input-border: #d8e0e8;
    --user-msg-bg: #007a9c;
    --user-msg-text: #ffffff;
    --bot-msg-bg: #f2f4f7;
    --bot-msg-text: #003057;
    --btn-text: #ffffff;
    --btn-gradient: linear-gradient(90deg, #20AA3E 0%, #03A588 100%);
    --btn-gradient-hover: linear-gradient(90deg, #1a8f33 0%, #028a72 100%);
    --icon-color: #707070;
    --accent-color: #03A588;
    --accent-color-2: #20AA3E;
    --shadow-sm: 0 1px 2px rgba(0, 48, 87, 0.05);
    --shadow-md: 0 4px 16px rgba(0, 48, 87, 0.08);
    --focus-ring: rgba(3, 165, 136, 0.18);
}

[data-theme='dark'] {
    /* Maumsarang Dark Theme — Deep Navy base */
    --bg-color: #0f1729;
    --chat-bg: #1a2540;
    --border-color: #2d3a55;
    --text-color: #e8eef5;
    --text-muted: #9aaabd;
    --input-bg: #243355;
    --input-border: #2d3a55;
    --user-msg-bg: #009db2;
    --user-msg-text: #ffffff;
    --bot-msg-bg: #243355;
    --bot-msg-text: #e8eef5;
    --btn-text: #ffffff;
    --btn-gradient: linear-gradient(90deg, #20AA3E 0%, #03A588 100%);
    --btn-gradient-hover: linear-gradient(90deg, #28c44b 0%, #04bd9c 100%);
    --icon-color: #9aaabd;
    --accent-color: #03A588;
    --accent-color-2: #20AA3E;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
    --focus-ring: rgba(3, 165, 136, 0.28);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;   /* 페이지(우측) 스크롤바 제거 — 내부 #chat-window 만 스크롤 */
    transition: background-color 0.3s, color 0.3s;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

#chat-container {
    width: 500px;
    height: 600px;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background-color: var(--chat-bg);
    position: relative;
    transition: background-color 0.3s, border-color 0.3s;
}

/* M.Talk 상단 고정 배너띠 (흰색 PNG 로고 → 브랜드 Navy 배경 위에 표시) */
.mtalk-header {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 0;   /* 상하 동일 간격으로 로고를 수직 중앙 정렬 */
    background-color: #003057;
    border-bottom: 2px solid var(--accent-color);
}

.mtalk-header img {
    height: 21px;
    width: auto;
    display: block;
}

/* M.Talk 안내 문구 배너 (스크롤 본문 첫 콘텐츠) */
.mtalk-gif-banner {
    margin-bottom: 14px;
}

.mtalk-intro {
    /* 기존 GIF 배너와 동일한 테두리/모서리/그림자 유지 */
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    background-color: var(--chat-bg);
    padding: 16px 18px;
    text-align: left;
}

.mtalk-intro-title {
    font-size: 15px;   /* 입력창 placeholder(#messageText)와 동일 크기 */
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 8px;
}

.mtalk-intro-desc {
    font-size: 13px;   /* 하단 "AI가 최선을 다해..." 문구와 동일 크기 */
    line-height: 1.6;
    color: var(--text-muted);
}

#user-ip-display {
    position: absolute;
    top: 15px;
    left: 20px;
    font-size: 12px;
    color: var(--icon-color);
    z-index: 10;
}

#theme-toggle {
    position: absolute;
    /* .mtalk-header 높이 45px(로고 21px + 상하 패딩 24px) 기준 수직 중앙: (45px - 36px) / 2 */
    top: 4.5px;
    left: 12px;
    background: none;
    border: none;
    color: var(--icon-color);
    cursor: pointer;
    font-size: 20px;
    padding: 6px;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color 0.2s;
    z-index: 10;
}

#theme-toggle:hover {
    background-color: var(--bot-msg-bg);
}

#chat-window {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
    border-bottom: 1px solid var(--border-color);
    transition: border-color 0.3s;
}

#messages {
    list-style-type: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
}

#messages>li {
    padding: 11px 16px;
    border-radius: 16px;
    margin-bottom: 10px;
    max-width: 80%;
    word-wrap: break-word;
    white-space: pre-wrap;
    font-size: 15px;
    line-height: 1.55;
    transition: background-color 0.3s, color 0.3s;
}

.user-message {
    background-color: var(--user-msg-bg);
    color: var(--user-msg-text);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
    box-shadow: var(--shadow-sm);
}

.bot-message {
    background-color: var(--bot-msg-bg);
    color: var(--bot-msg-text);
    align-self: flex-start;
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px;
}

#chat-form {
    display: flex;
    padding: 14px;
    background-color: var(--chat-bg);
    transition: background-color 0.3s;
    align-items: center;
    width: 100%;
    box-sizing: border-box;
    gap: 10px;
}

.input-wrapper {
    position: relative;
    flex: 1;
    display: flex;
    align-items: center;
    width: 100%;
}

#messageText {
    width: 100%;
    border: 1px solid var(--input-border);
    background-color: var(--input-bg);
    color: var(--text-color);
    border-radius: 14px;
    padding: 12px 64px 12px 16px;
    font-family: inherit;
    font-size: 15px;
    transition: background-color 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
}

#char-count {
    position: absolute;
    right: 14px;
    font-size: 0.78em;
    color: var(--icon-color);
    pointer-events: none;
}

#messageText:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--focus-ring);
}

#chat-form button {
    background: var(--btn-gradient);
    color: var(--btn-text);
    border: none;
    padding: 12px 22px;
    border-radius: 14px;
    cursor: pointer;
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: filter 0.2s, transform 0.1s, box-shadow 0.2s;
    box-shadow: 0 2px 6px rgba(3, 165, 136, 0.25);
}

#chat-form button:hover {
    background: var(--btn-gradient-hover);
    filter: brightness(1.02);
}

#chat-form button:active {
    transform: scale(0.98);
}

/* 처리 중 메시지 애니메이션 */
.loading-message {
    animation: blink-animation 1.s infinite ease-in-out;
}

@keyframes blink-animation {
    0% {
        opacity: 0.4;
    }

    50% {
        opacity: 1;
    }

    100% {
        opacity: 0.4;
    }
}

/* 평가 및 피드백 UI 스타일 */
.evaluation-score {
    display: block;
    font-size: 0.8em;
    color: var(--icon-color);
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
}

.feedback-container {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.feedback-text {
    font-size: 0.9em;
    color: var(--text-color);
}

.feedback-button {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, border-color 0.2s;
}

.feedback-button:hover {
    background-color: var(--bg-color);
    border-color: var(--accent-color);
}

.feedback-input-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
    margin-top: 5px;
}

.feedback-input {
    width: 100%;
    min-height: 60px;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-family: inherit;
    resize: vertical;
    box-sizing: border-box;
}

[data-theme='dark'] .feedback-input {
    border-color: var(--border-color);
}

.feedback-submit-button {
    align-self: flex-end;
    background: var(--btn-gradient);
    color: var(--btn-text);
    border: none;
    padding: 6px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: 600;
    transition: filter 0.2s;
}

.feedback-submit-button:hover {
    background: var(--btn-gradient-hover);
}

/* Markdown Elements Styling */
.bot-message strong,
.user-message strong,
.bot-message b,
.user-message b {
    font-weight: 700;
}

.bot-message em,
.user-message em,
.bot-message i,
.user-message i {
    font-style: italic;
}

.bot-message ul,
.user-message ul,
.bot-message ol,
.user-message ol {
    display: flex;
    /* 세로 나열 고정. flex 컨테이너 유지 필수 — #messages>li의 white-space: pre-wrap이
       marked.js 출력의 태그 사이 개행을 빈 줄로 렌더링하는 것을 flex가 막아주고 있음 */
    flex-direction: column;
    gap: 4px;
    margin: 2px 0 2px 20px;
    padding: 0;
}

.bot-message li,
.user-message li {
    margin-bottom: 0;
    line-height: 1.3;
}

.bot-message p,
.user-message p,
.bot-message .bot-text p {
    margin: 0 !important;
}

.bot-message p:last-child,
.user-message p:last-child {
    margin-bottom: 0;
}

.bot-message code,
.user-message code {
    font-family: ui-monospace, "SF Mono", Consolas, Monaco, "Andale Mono", monospace;
    background-color: rgba(0, 48, 87, 0.06);
    padding: 2px 6px;
    border-radius: 4px;
    color: #007a9c;
    font-size: 0.92em;
}

.bot-message pre {
    background-color: #f2f4f7;
    border: 1px solid var(--border-color);
    padding: 12px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 8px 0;
}

.bot-message pre code {
    background-color: transparent;
    color: #003057;
    padding: 0;
    white-space: pre;
}

[data-theme='dark'] .bot-message code,
[data-theme='dark'] .user-message code {
    background-color: rgba(232, 238, 245, 0.1);
    color: #35cada;
}

[data-theme='dark'] .bot-message pre {
    background-color: #0f1729;
    border: 1px solid var(--border-color);
}

[data-theme='dark'] .bot-message pre code {
    color: #e8eef5;
}

.bot-message h1,
.bot-message h2,
.bot-message h3,
.user-message h1,
.user-message h2,
.user-message h3 {
    margin-top: 10px;
    margin-bottom: 5px;
    font-weight: 600;
    line-height: 1.25;
}

.bot-message h1 {
    font-size: 1.5em;
}

.bot-message h2 {
    font-size: 1.3em;
}

.bot-message h3 {
    font-size: 1.1em;
}

/* Trace 패널 */
#trace-container h2 {
    color: var(--text-color);
}

#trace-content {
    font-family: ui-monospace, "SF Mono", Consolas, Monaco, monospace;
    font-size: 13px;
    color: var(--text-color);
}

/* 스크롤바 */
#chat-window::-webkit-scrollbar,
#trace-content::-webkit-scrollbar {
    width: 8px;
}

#chat-window::-webkit-scrollbar-track,
#trace-content::-webkit-scrollbar-track {
    background: transparent;
}

#chat-window::-webkit-scrollbar-thumb,
#trace-content::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 4px;
}

#chat-window::-webkit-scrollbar-thumb:hover,
#trace-content::-webkit-scrollbar-thumb:hover {
    background-color: var(--icon-color);
}

/* 채팅창 스크롤바 숨김 (스크롤 기능은 유지) */
#chat-window {
    scrollbar-width: none;       /* Firefox */
    -ms-overflow-style: none;    /* IE/legacy Edge */
}

#chat-window::-webkit-scrollbar {
    display: none;               /* Chrome/Safari/Edge */
    width: 0;
}

/* Responsive Design (Mobile / Tablet) */
@media screen and (max-width: 1024px) {
    #main-container {
        flex-direction: column;
        /*padding: 10px;*/
        align-items: stretch;   /* 자식(챗/트레이스 컨테이너)이 폭 100%로 늘어나도록 */
        width: 100%;            /* 뷰포트 폭 전체 차지 → 자식 width:100%의 기준 폭 확정 */
    }

    #chat-container {
        width: 100%;   /* 상한(max-width) 제거 — 태블릿/모바일에서 화면 폭 100% 채움 */
        box-sizing: border-box;   /* 1px 테두리를 폭 안에 포함 → 오른쪽 테두리 잘림 방지 */
        height: 70vh;
        border-radius: 0;   /* 태블릿/모바일에서 가장 큰 컨테이너 모서리 라운드 제거 */
    }

    #trace-container {
        width: 100%;   /* 상한(max-width) 제거 — 채팅 컨테이너와 동일하게 폭 100% */
        height: 25vh;
        border-left: none;
        border-top: 1px solid var(--border-color);
        padding-left: 0;
        padding-top: 10px;
    }
}

@media screen and (max-width: 600px) {
    #chat-container {
        height: 85vh;
    }

    #trace-container {
        display: none !important;
    }
}